.main{
    width: 100%;
    height: 688px;

}
.main-c{
    width: 1250px;
    height: 100%;
    margin: 0 auto;
    /* background-color: skyblue; */
    padding-top: 0.2px;
}
.main-c .nav{
    margin-top: 97px;
}
.main-c .nav-item{
    float: left;
    width: 287px;
    height: 494px;
    background: url(../img/p5/t1.jpg) no-repeat;
    background-size: cover;
    margin-right: 25px;
}
.main-c .nav-item-1{
    float: left;
    width: 287px;
    height: 494px;
    background: url(../img/p5/t2.jpg) no-repeat;
    background-size: cover;
    margin-right: 25px;
}
.main-c .nav-item-2{
    float: left;
    width: 287px;
    height: 494px;
    background: url(../img/p5/t3.jpg) no-repeat;
    background-size: cover;
    margin-right: 25px;
}
.main-c .nav-item-3{
    float: left;
    width: 287px;
    height: 494px;
    background: url(../img/p5/t4.jpg) no-repeat;
    background-size: cover;
    margin-right: 25px;
}
.main-c .nav a{
    display: block;
    width: 120px;
    height: 20px;
    margin-top: 124px;
    margin-left: 36px;
    font-size: 20px;
    color: #626262;
}
.main-c .nav p{
    display: block;
    margin-top: 44px;
    margin-left: 34px;
    font-size: 16px;
    color: #4d4c4c;
    line-height: 32px;
}